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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: a) 87. $3^{3}$ + 64 . 73 – 23. $3^{3}$ b) (-234)+(-352)+(-66) +252 c) (347–73)-(137+247) d) $2020^{0}$ – {$15^{2}$ :[(5.25 – $2^{2}$

Toán Lớp 6: a) 87. $3^{3}$ + 64 . 73 – 23. $3^{3}$
b) (-234)+(-352)+(-66) +252
c) (347–73)-(137+247)
d) $2020^{0}$ – {$15^{2}$ :[(5.25 – $2^{2}$ . $5^{2}$ ) –25]}

Comments ( 2 )

  1. Giải đáp+Lời giải và giải thích chi tiết:
    $a)$ $87$ . $3^{3}$ $\text{+ 64 . 73 – 23 . }$$3^{3}$
    $\text{= }$$3^{3} . ( 87 – 23 ) + 64 . 73$
    $\text{= }$$3^{3} . 64 + 64 . 73$
    $\text{= 64 . ( 27 + 73 )}$
    $\text{= 64 . 100}$
    $\text{= 6400}$
    $\text{b) (-234) + (-352) + (-66) + 252 }$
    $\text{= [ (-352) + 252 ] + [ (-234) + (-66) ] }$
    $\text{= (-100) + (-300)}$
    $\text{= -400}$
    $\text{c) (347 – 73 ) – (137 + 247)}$
    $\text{= 347 – 73 – 137 – 247}$
    $\text{= (347 – 247) + (73 – 137) }$
    $\text{= 100 + (-64)}$
    $\text{= 36}$
    $\text{d) }$$2020^{0} – $ {$15^{2} : [( 5 . 25 – $ $2^{2} . $ $5^{2} ) – 25 ]$}
    $\text{= 1 – }$ { $15^{2} : [( 125 – 100 ) – 25]$ }
    $\text{= 1 – }$ { $15^{2} : [25 – 25] $ }
    $\text{= 1 – }$ { $15^{2} : 0$ }
    $\text{= 1 – 0}$
    $\text{= 1}$
    $#Hoctot$

  2. Giải đáp:
    a) 87.3³+64.73-23.3³

    =3³(87-23)+64.73

    =3³.64+64.73

    =64(27+73)

    =64.100

    =6400

    b) (-234)+(-352)+(-66) +252 = -400
    c) (347–73)-(137+247) = -110
    Lời giải và giải thích chi tiết:
     

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222-9+11+12:2*14+14 = ? ( )

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